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(Beyond Pesticides, March 7, 2017) Another study, published by a team of French scientists in the journal Occupational and Environmental Medicine, links childhood behavioral problems to pyrethroid insecticide exposure. Synthetic pyrethroids are a class of insecticides that have increased in use over the past decade due to assumptions that they pose fewer risks to human health than older pesticide chemistries, such as organophosphates. However, this latest study is part of a growing body of research showing that pyrethroids share similar neurocognitive health concerns as these older pesticides. . In this research, scientists investigate the interplay between pyrethroid exposure and behavioral problems through a longitudinal cohort study, which tracks levels of pyrethroid metabolites, or breakdown products, in the urine of mothers beginning between six and 19 gestational weeks and then in their children up through six years of age. Children’s behavior is measured through a screening questionnaire known as the Strengths and Difficulties Questionnaire (SDQ). SDQ measures how social a child is (altruism), whether the child has difficulty sharing problems or asking for help (internalizing disorders), as well as how defiant or disruptive a child is (externalizing disorders). The study controlled for a number of confounding factors, such as weight, education, location (rural or […]

(Beyond Pesticides, July 25, 2012) A Texas border study has found that air samples in the homes of pregnant Hispanic women contain multiple household pesticides that could harm fetuses and young children. The first study of its kind conducted by the School of Medicine at The University of Texas Health Science Center San Antonio, finds traces of both household and agricultural pesticides that have been linked to disorders such as autism and attention deficit hyperactivity disorder. The researchers sampled air in 25 households, finding at least five pesticides in 60 percent of the dwellings. Nine other pesticides were identified in less than one-third of the homes. All the women were in the third trimester of pregnancy, when the fetal brain undergoes a growth spurt. Numerous studies have reported birth defects and developmental problems when fetuses and infants are exposed to pesticides, especially exposures that adversely affect mental and motor development during infancy and childhood. This new report is in the summer issue of the Texas Public Health Journal sent to members this week. The study found 92 percent of air samples contained o-phenylphenol, which is used as a fungicide, germicide and household disinfectant, while 80 percent of samples contained chlorpyrifos, […]

(Beyond Pesticides, April 16, 2012) The U.S. National Marine Fisheries Service (NMFS) has released a draft Biological Opinion finding that three commonly used herbicides are increasing the chance of extinction for threatened and endangered Pacific salmon and steelhead runs. The NMFS assessment reverses earlier assurances from the U.S. Environmental Protection Agency (EPA) that the pesticides are “not likely to adversely affect” the dwindling salmon populations. The draft Opinion also contains restrictions on applying the three pesticides near waterways in California, Washington, Oregon and Idaho that provide habitat for the threatened and endangered runs. Public comment on the draft is being accepted through April 30 and the restrictions on applying the pesticides will take effect no later than one year after the final assessment is released. NMFS prepared the draft Opinion in response to EPA’s initial assessment of the risk that current uses of the herbicides oryzalin, pendimethalin and trifluralin pose for the threatened and endangered salmon and steelhead species. NMFS’ findings contradict significant conclusions from EPA’s work and highlight weaknesses in the agency’s current ecological risk assessment process that underestimate risk and fail to meet modern standards of analysis. For example, NMFS cites EPA’s failure to provide any analysis of […]

(Beyond Pesticides, September 29, 2008) A new study by Pesticide Action Network North America (PANNA) confirms that school children in Florida continue to breathe air contaminated by hazardous pesticides. Air monitoring near South Woods Elementary School in Hastings detected four agricultural chemicals in the air, often at levels that pose unacceptable risks to children. The report mirrors the results of a similar study released in April 2007, confirming the existence of an ongoing problem of pesticide contamination that is more extensive than previously documented. The new test results show that in October, November and December 2007 the air in Hastings was contaminated with the pesticides endosulfan, diazinon http://www.beyondpesticides.org/gateway/pesticide/diazinon.htm, trifluralin and chlorothalonil. Of these, two are neurotoxins, two are suspected carcinogens, and three are or will soon be banned in Europe. Endosulfan, the pesticide of greatest concern, was found in 87% of the samples, and, on several days, exceeded levels of concern. The air monitoring was conducted by concerned area residents using a “Drift Catcher” device, a simple air sampling system that sucks air into tubes, where the pesticides are absorbed and captured. The tubes are then sent to a laboratory, where the chemicals can be identified and the concentrations measured. […]